Arc start control method in robot welding

a robot welding and control method technology, applied in the direction of arc welding apparatus, welding apparatus, manufacturing tools, etc., can solve the problems of wire tip adhesion to the base metal, small vibration, abrupt change in the position of the wire tip, etc., and achieve the effect of improving the arc starting
US8383986B2Active Publication Date: 2013-02-26DAIHEN CORP
11 Cites 4 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
DAIHEN CORP
Publication Date
2013-02-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

An arc start control method in robot welding includes the steps of shorting a welding wire with a base metal, retracting a welding torch by a welding robot for taking the welding wire off the base metal to generate an initial arc, retracting the welding torch to a predetermined position with maintaining the initial arc maintained while applying an initial arc current smaller than a steady welding current during this initial arc period, and starting to feed the welding wire steadily and to supply the steady welding current so as to make a transition from the initial arc to a steady arc as well as starting to move the welding torch along a welding line. During a re-shorting prevention period which starts from a beginning of the initial arc period, a re-shorting prevention current which is larger than the initial arc current is applied in order to prevent re-shortening between the wire tip and the base metal right after the initial arc was generated. Thereafter, the initial arc current is applied.
Need to check novelty before this filing date? Find Prior Art

Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to an arc start control method in robot welding for improved arc start in the retract arc starting in which the welding wire is first shorted with the base metal and then the welding torch is retracted by the welding robot to move the welding wire off the base metal to generate an arc.

[0003] 2. Description of the Related Art

[0004] FIG. 5 is a configuration diagram of a robot welder which performs consumable electrode arc welding. A robot controller RC outputs an operation control signal Mc for controlling operation of a multi-axis servo motor disposed in a robot main body (manipulator) RM, as well as sending and receiving interface signals which include a welding start signal St, a feeding rate setting signal Fr, a welding voltage setting signal Vr and a short / arc determination signal Sa, to and from a welding power source PS. The welding power source PS, which receives and sends the interfac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More